The monthly worldwide average number of airplane crashes of commercial airlines is 2.2

The monthly worldwide average number of airplane crashes of commercial airlines is 2.2. What is the probability that there will be

a) more than 2 such accidents in the next month?
b) more than 4 such accidents in the next 2 months?
c) more than 5 such accidents in the next 3 more than 5 such accidents in the next 3 months? Explain your reasoning!